if you could pick between this world we live in and a world where women were only fertile once a year with only one period but before that period for several days would be so sexually overcharged they would offer themselves sexually to any, ANY! man that approached them. Which do you you pick? are you male or female?
The single period would be no worse than a normal period it's predicable and pregnancy is impossible the rest of the year'
for the rest of the time desire and enjoyment would be the same